BS EN 13384-2-2015 Chimneys Thermal and fluid dynamic calculation methods Chimneys serving more than one heating appliance《烟囱 热和流体动态计算方法 适合一种以上加热器具的烟囱》.pdf

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1、BSI Standards PublicationBS EN 13384-2:2015Chimneys Thermal and fluiddynamic calculation methodsPart 2: Chimneys serving more than oneheating applianceBS EN 13384-2:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 13384-2:2015.It supersedes BS EN 13384-2:200

2、3+A1:2009 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee B/506, Chimneys.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a cont

3、ract. Users are responsible for its correctapplication. The British Standards Institution 2015. Published by BSI Standards Limited 2015ISBN 978 0 580 80848 7ICS 91.060.40Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the auth

4、ority of theStandards Policy and Strategy Committee on 30 April 2015.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dBS EN 13384-2:2015EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 13384-2 April 2015 ICS 91.060.40 Supersedes EN 13384-2:2003+A1:2009English Version Chi

5、mneys - Thermal and fluid dynamic calculation methods - Part 2: Chimneys serving more than one heating appliance Conduits de fume - Mthodes de calcul thermo-araulique - Partie 2: Conduits de fume desservant plus dun appareil de chauffage Abgasanlagen - Wrme- und strmungstechnische Berechnungsverfahr

6、en - Teil 2: Abgasanlagen mit mehreren Feuersttten This European Standard was approved by CEN on 24 January 2015. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any a

7、lteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language

8、made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Es

9、tonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR ST

10、ANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2015 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 13384-2:2015 EBS EN 13384-2:2015EN 13

11、384-2:2015 (E) 2 Contents Page Foreword 5 Introduction .6 1 Scope 7 2 Normative references 7 3 Terms and definitions .8 4 General symbols and abbreviations 9 5 Calculation method9 5.1 General principles9 5.2 Pressure equilibrium condition . 11 5.2.1 Negative pressure chimneys . 11 5.2.2 Positive pre

12、ssure chimneys 12 5.3 Mass flow requirement . 13 5.4 Pressure requirements . 13 5.4.1 Negative pressure chimneys . 13 5.4.2 Positive pressure chimneys 14 5.5 Temperature requirement 15 5.6 Calculation procedure 15 6 Flue gas data characterising the heating appliance . 18 7 Data for chimney and conne

13、cting flue pipes . 19 8 Basic data for the calculation 20 8.1 General . 20 8.2 Air temperatures . 20 8.2.1 External air temperature (TL) . 20 8.2.2 Ambient air temperature (Tu) . 20 8.3 External air pressure (pL) . 20 8.4 Gas constant . 20 8.4.1 Gas constant of the air (RL) 20 8.4.2 Gas constant of

14、flue gas (R) 20 8.5 Density of air (L) 20 8.6 Specific heat capacity of the flue gas (cp) 20 8.7 Water vapour content (H2O),j) and condensing temperature (Tsp) . 20 8.8 Correction factor for temperature instability (SH) 21 8.9 Flow safety coefficient (SE) 21 8.10 External coefficient of heat transfe

15、r . 21 9 Determination of temperatures . 21 10 Mixing calculations . 23 10.1 General . 23 10.2 Flue gas mass flow (j,m ) 23 10.3 Flue gas temperature at the inlet of the chimney segment (Te,j) 23 10.4 CO2-content of the flue gas in the chimney segment (CO2),j) . 23 10.5 H2O-content of the flue gas (

16、H2O),j) 24 10.6 Gas constant of the flue gas (R,j) 24 10.7 Flue gas data . 24 10.7.1 Specific heat capacity (cpV,j), (cp,j) 24 BS EN 13384-2:2015EN 13384-2:2015 (E) 3 10.7.2 Thermal conductivity of the flue gas (AV,j), (A,j) 24 10.7.3 Dynamic viscosity (AV,j), (A,j) 25 10.7.4 Condensing temperature

17、(TSP) . 25 11 Density and velocity of the flue gas 25 12 Determination of the pressures . 26 12.1 Pressures at each inlet of the chimney segments . 26 12.1.1 Draught . 26 12.1.2 Positive pressure . 26 12.1.3 Draught due to chimney effect in the chimney segment (PH,j) 27 12.1.4 Pressure resistance in

18、 the chimney segment (PR,j) . 27 12.2 Minimum draught required at the flue gas inlet into the chimney and maximum allowed draught (PZeand PZemax) and maximum and minimum differential pressure at the flue gas inlet into the chimney (PZOeand PZOemin) 29 12.2.1 Minimum required and maximum allowed drau

19、ght . 29 12.2.2 Maximum available and minimum allowed differential pressure . 29 12.2.3 Calculated pressure resistance of the connecting flue pipe (PV,j) 30 12.2.4 Calculated pressure resistance of the air supply (PBc,j) 32 13 Inner wall temperature 33 14 Cascade installations 33 14.1 Principle of t

20、he calculation method . 33 14.2 Pressure equilibrium condition . 34 14.2.1 Negative pressure cascade installation 34 14.2.2 Positive pressure cascade installation . 35 14.3 Mass flow requirement 36 14.4 Pressure requirements . 36 14.4.1 Negative pressure chimneys 36 14.4.2 Positive pressure chimneys

21、 . 37 14.5 Temperature requirement . 38 14.6 Calculation procedure . 38 14.7 Pressures at the outlet of the connecting flue pipe and pressures at the inlet of the collector segment 38 14.7.1 Pressure at the flue gas inlet into the collector segment (PZC,j,lor PZOC,j,l). 38 14.7.2 Pressures required

22、or available at the outlet of the connecting flue pipe (PZeC,j,l, PZOeC,j,l) 42 14.8 Inner wall temperature (TiobC,j,l) . 44 15 Balanced flue chimney 44 15.1 Principle of the calculation method . 44 15.2 Pressure equilibrium condition . 44 15.3 Mass flow requirement 45 15.4 Pressure requirements . 4

23、5 15.4.1 Negative pressure chimneys 45 15.4.2 Positive pressure chimneys . 45 15.5 Temperature requirements . 47 15.6 Calculation procedure for balanced flue chimneys . 47 15.7 Mass flow of the supply air 49 15.8 Determination of the temperatures in balanced flue chimneys 50 15.8.1 Separate ducts .

24、50 15.8.2 Concentric ducts . 50 15.8.3 Concentric connection pipes . 58 15.9 Pressures of the air supply ducts 64 15.9.1 Draught due to chimney effect of the air supply duct of chimney segment j . 64 15.9.2 Draught due to chimney effect of the air supply duct of connection pipes 64 15.9.3 Pressure r

25、esistance of the air supply duct of the chimney segment j (PRB,j) 64 15.9.4 Pressure resistance of the air supply duct of the connection pipe j (PRBV,j) . 66 15.10 Density and velocity of the supply air . 68 BS EN 13384-2:2015EN 13384-2:2015 (E) 4 15.10.1 Density and velocity of the supply air in th

26、e air supply duct averaged over the length of the chimney segment . 68 15.10.2 Density and velocity of the supply air averaged over the length of the connection pipes 68 16 Consideration of chimney fans . 69 16.1 General . 69 16.2 Inline fans 70 16.3 Exhaust fans 71 Annex A (informative) Recommendat

27、ions . 72 A.1 General . 72 A.2 Recommendations for the chimney and heating appliances . 72 A.3 Recommendations for connecting flue pipes 72 Annex B (informative) Characteristics for the heating appliance . 73 BS EN 13384-2:2015EN 13384-2:2015 (E) 5 Foreword This document (EN 13384-2:2015) has been p

28、repared by Technical Committee CEN/TC 166 “Chimneys”, the secretariat of which is held by ASI. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by October 2015, and conflicting national standards shal

29、l be withdrawn at the latest by October 2015. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 13384-2:2003

30、+A1:2009. According to EN 13384-2:2003+A1:2009 the following fundamental changes are given: editorial mistakes have been corrected; mistakes in formulas have been corrected; characteristic values for heating appliances for solid fuel and for liquid fuels in Annex B have been adapted to actual data;

31、for the mixture of fuels a clarification about the rise of the dew point has been added; for non-concentric ducts the calculation of the mean temperature of the air supply has been amended; the process for iteration for appliances with low impact of the pressure to the flue gas mass flow (e.g. CHP w

32、ith combustion engine) has been simplified; for chimney fans a calculation procedure has been added; This standard is one of a series of standards prepared by CEN/TC 166 comprising product standards and execution standards for chimneys. National installation rules are not regarded in the standard. T

33、his document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association. This European Standard “Chimneys Thermal and fluid dynamic calculation methods” consists of three Parts: Part 1: Chimneys serving one heating appliance Part 2: Chimneys ser

34、ving more than one heating appliance Part 3: Methods for the development of diagrams and tables for chimneys serving one heating appliance According to the CEN-CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard:

35、 Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,

36、Sweden, Switzerland, Turkey and the United Kingdom. BS EN 13384-2:2015EN 13384-2:2015 (E) 6 Introduction The calculation described in this standard is complex and is intended to be solved by using a computer programme. The general principles of this calculation method of EN 13384-1 also apply to thi

37、s standard. This standard is in support of the execution standards for a chimney installation serving more than one heating appliance. The execution standard identifies limitations and safety considerations associated with the design, installation, commissioning and maintenance of a chimney serving

38、more than one heating appliance (not dealt within the calculation method). BS EN 13384-2:2015EN 13384-2:2015 (E) 7 1 Scope This part of EN 13384 specifies methods for calculation of the thermal and fluid dynamic characteristics of chimneys serving more than one heating appliance. This part of EN 133

39、84 covers both the cases, either a) where the chimney is connected with more than one connecting flue pipe from individual or several appliances in a multi-inlet arrangement; or b) where the chimney is connected with an individual connecting flue pipe connecting more than one appliance in a cascade

40、arrangement. The case of multiple inlet cascade arrangement is covered by the case a). This part of EN 13384 deals with chimneys operating under negative pressure conditions (there can be positive pressure condition in the connecting flue pipe) and with chimneys operating under positive pressure con

41、ditions and is valid for chimneys serving heating appliances for liquid, gaseous and solid fuels. This part of EN 13384 does not apply to: chimneys with different thermal resistance or different cross-section in the various chimney segments. This part does not apply to calculate energy gain; chimney

42、s with open fire places, e.g. open fire chimneys or chimney inlets which are normally intended to operate open to the room; chimneys which serve different kinds of heating appliances regarding natural draught, fan assisted, forced draught or combustion engine. Fan assisted appliances with draught di

43、verter between the fan and the chimney are considered as natural draught appliances; chimneys with multiple inlets from more than 5 storeys. (This does not apply to balanced flue chimney.); chimneys serving heating appliances with open air supply through ventilation openings or air ducts, which are

44、not installed in the same air supply pressure region (e.g. same side of building). For positive pressure chimneys this part only applies if any heating appliance which is out of action can be positively isolated to prevent flue gas back flow. 2 Normative references The following documents, in whole

45、or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 1443:2003, Chimneys - General requirem

46、ents EN 13384-1:2015, Chimneys - Thermal and fluid dynamic calculation methods - Part 1: Chimneys serving one appliance EN 15287-1:2007+A1:2010, Chimneys - Design, installation and commissioning of chimneys - Part 1: Chimneys for non-roomsealed heating appliances BS EN 13384-2:2015EN 13384-2:2015 (E

47、) 8 EN 15287-2:2008, Chimneys - Design, installation and commissioning of chimneys - Part 2: Chimneys for roomsealed appliances prEN 16475-2, Chimneys - Accessories - Part 2: Chimney fans - Requirements and test methods 3 Terms and definitions For the purposes of this document, the terms and definit

48、ions given in EN 1443:2003, EN 13384-1:2015, EN 15287-1:2007+A1:2010, EN 15287-2:2008 and the following apply. 3.1 chimney segment part of a chimney between two consecutive flue gas connections or between the last flue gas connection and the chimney outlet 3.2 collector segment part of a connecting

49、flue pipe between two consecutive flue gas connections or between the last flue gas connection and the chimney inlet 3.3 flue gas mass flow m mass of the flue gas leaving the heating appliance through the connecting flue pipe per unit of time Note 1 to entry: In case of a chimney serving more than one heating appliance, the air being transported through an appliance which is out of action is also given the term flue gas mass flow. 3.3.1 declared flue gas mass flow W,jm flue gas mass flow given by the manufacturer of the heating